void HttpInterface::evSubscribe(HttpRequest* req, strings& args)
{
// eventSubscriptions[conn] is an unordered set of strings
if (args.size() == 1)
eventSubscriptions[req].insert("*");
else
for (strings::iterator i = args.begin()+1; i != args.end(); ++i)
eventSubscriptions[req].insert(*i);
strings headers;
headers.push_back("Content-Type: text/event-stream");
headers.push_back("Cache-Control: no-cache");
headers.push_back("Connection: keep-alive");
addHeaders(req, headers);
appendResponse(req,200,true,"");
// connection must stay open!
}
// Incoming User Messages
void HttpInterface::incomingUserMsg(const UserMessage *userMsg)
{
if (verbose)
cerr << "incomingUserMsg msg ("<< userMsg->type <<","<< &userMsg->data <<")" << endl;
// skip if event not known (yet, aesl probably not loaded)
try { commonDefinitions.events.at(userMsg->type); }
catch (const std::out_of_range& oor) { return; }
if (commonDefinitions.events[userMsg->type].name.find(L"R_state")==0)
{
// update variables
}
if (eventSubscriptions.size() > 0)
{
// set up SSE message
std::stringstream reply;
string event_name = WStringToUTF8(commonDefinitions.events[userMsg->type].name);
reply << "data: " << event_name;
for (size_t i = 0; i < userMsg->data.size(); ++i)
reply << " " << userMsg->data[i];
reply << "\r\n\r\n";
// In the HTTP world we set up a stream of Server-Sent Events for this.
// Note that event name is in commonDefinitions.events[userMsg->type].name
for (StreamEventSubscriptionMap::iterator subscriber = eventSubscriptions.begin();
subscriber != eventSubscriptions.end(); ++subscriber)
{
if (subscriber->second.count("*") >= 1 || subscriber->second.count(event_name) >= 1)
{
appendResponse(subscriber->first, 200, true, reply.str().c_str());
}
}
}
}
void TTscriptBase::addResponse(int id) {
appendResponse(-1, nullptr, id);
}
